The master chief petty officer of the Navy is the primary enlisted advisor to the Chief of Naval Operations (CNO) and the Chief of Naval Personnel.
The Master Chief Petty Officer of the Navy is appointed by the Chief of Naval Operations to serve as a spokesperson to address the issues of enlisted personnel to the highest positions in the Navy
Master chief petty officer (MCPO) is an enlisted rank in some navies. It is the ninth (just below the rank of MCPON) enlisted rank (with pay grade E-9) in the United States Navy and United States Coast Guard, just above the Senior Chief Petty Officer (SCPO).
The Master Chief Petty Officer of the Navy (MCPON) is the senior enlisted person in the Navy.
Their exact duties vary, depending on the CNO, though they generally devote much of their time to travelling throughout the Navy observing training and talking to sailors and their families. Their personnel code is N00D as the senior enlisted advisor to the Chief of Naval Operations and PERS-00D in their special advisory capacity to the Chief of Naval Personnel/Deputy Chief of Naval Operations (Manpower, Personnel, and Training).
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